curve

1 curve /ˈkɚv/ noun
plural curves
1 curve
/ˈkɚv/
noun
plural curves
Britannica Dictionary definition of CURVE
[count]
1 
: a smooth, rounded line, shape, path, etc.
2 
technical : a curved line on a graph that shows how something changes or is affected by one or more conditions
— see also learning curve
3 
: a curving line or shape of the human body and especially of a woman's body — usually plural
4 
baseball : curveball — often used figuratively

ahead of the curve

chiefly US, approving
: faster about doing something than other people, companies, etc.

behind the curve

chiefly US, disapproving
: slower about doing something than other people, companies, etc.
2 curve /ˈkɚv/ verb
curves; curved; curving
2 curve
/ˈkɚv/
verb
curves; curved; curving
Britannica Dictionary definition of CURVE
1 
[no object] : to form a curve : to turn or change from a straight line, shape, or path to a smooth, rounded one
2 
[+ object] : to cause (something) to form a curve